Application of fiber Bragg grating sensor for rebar corrosion

Jiang Geng; Jin Wu; Xinming Zhao

doi:10.1117/12.840341

20 October 2009 Application of fiber Bragg grating sensor for rebar corrosion

Jiang Geng, Jin Wu, Xinming Zhao

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749333 (2009) https://doi.org/10.1117/12.840341
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

Corrosion of rebar is one of the most important factors which can affect the durability of concrete structure, so in the service of these structures, measuring the degree of corrosion, and then evaluating the reliability of these structures are very important. The most significant characteristic of the rebar corrosion is its volume expansion. By the principle and characteristics of fiber bragg grating (FBG), a sensor for rebar corrosion is designed. In this paper, based upon laboratory studies, the fiber bragg grating sensor is applied in No.58 Berth of Lianyungang Port. According to the filed condition, a proper embedding scheme is proposed. Considering the optimal sensor placement, the monitoring points are determined and five sensor groups were applied in the structure. Based on the results of the calibration experiment, the relationship between corrosion ratio and the change of wavelength is established. So the corrosion status of the structure can be obtained by measuring wavelength. The study shows that the FBG sensor was feasible to monitor the status of rebar in concrete structures.

Citation Download Citation

Jiang Geng, Jin Wu, and Xinming Zhao "Application of fiber Bragg grating sensor for rebar corrosion", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749333 (20 October 2009); https://doi.org/10.1117/12.840341

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